A method for drying large-capacity lithium-ion power battery cells

A technology of power battery and drying method, applied in drying solid materials, electrolyte battery manufacturing, non-aqueous electrolyte battery, etc., can solve the problems of increasing the load of dehumidifier and vacuum pump, consuming large circulating gas and heat, and emulsification of vacuum pump oil, etc. The effect of reducing the amount of circulating gas, improving the drying rate and efficiency, and increasing the heating rate
CN104142045BActive Publication Date: 2016-03-23中创新航科技(江苏)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
中创新航科技(江苏)有限公司
Publication Date
2016-03-23
Patent Text Reader

Abstract

The invention discloses a method for drying large-capacity lithium-ion power battery cells, and belongs to the technical field of lithium battery production and manufacturing. The method comprises the following steps: (1) placing the battery cell to be dried in a drying furnace, heating to raise the temperature of the furnace, and evacuating to a relative vacuum degree ≤ -99.0; (2) evacuating the vacuum to a relative vacuum degree of - 5.0~-85.0; (3) Run the blower equipment in the drying furnace to keep warm; (4) Vacuumize to a relative vacuum degree ≤ -99.0 and continue to vacuumize; (5) Sequentially perform (2), (3), (4 ) steps to cycle. The method of the invention utilizes the dry and wet hot gas convection state and the vacuum state in the furnace to dry the battery cells alternately, which can effectively reduce the moisture content of the battery cells with a small number of cycles, improve the drying rate and efficiency of the battery cells, and reduce the circulating gas Dosage and reduce calorie consumption.
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Description

technical field

[0001] The invention specifically relates to a method for drying large-capacity lithium-ion power battery cells, and belongs to the technical field of lithium battery production and manufacturing. Background technique

[0002] Due to the demand for energy and environmental protection, lithium-ion energy storage batteries have been developed rapidly. With the wide application of large-capacity lithium-ion batteries, the requirements for their life and safety performance are becoming more and more stringent. The moisture content of battery cells in the production process is Important process parameters that affect the life and safety performance of high-capacity lithium-ion batteries. How to reduce and control the moisture content of battery pole pieces, reduce the drying time of battery pole pieces, improve production efficiency, and save costs is an important technological issue in the production process of large-capacity lithium-ion batteries.

[0003] At p...

Claims

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